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<head><meta charset="utf-8"><title>weekly meeting 2020-04-23 #54818 · t-compiler · Zulip Chat Archive</title></head>
<h2>Stream: <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/index.html">t-compiler</a></h2>
<h3>Topic: <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html">weekly meeting 2020-04-23 #54818</a></h3>

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<a name="194969124"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/194969124" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Santiago Pastorino <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#194969124">(Apr 22 2020 at 18:01)</a>:</h4>
<p>Hi <span class="user-group-mention" data-user-group-id="897">@T-compiler/meeting</span>; the triage meeting will be starting in 20 hours</p>



<a name="194969301"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/194969301" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Santiago Pastorino <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#194969301">(Apr 22 2020 at 18:02)</a>:</h4>
<p>The <span class="user-group-mention" data-user-group-id="2403">@WG-prioritization</span> will be doing pre-triage in <a class="stream-topic" data-stream-id="227806" href="/#narrow/stream/227806-t-compiler.2Fwg-prioritization/topic/pre-meeting.20triage.202020-04-23.20.2354818">#t-compiler/wg-prioritization &gt; pre-meeting triage 2020-04-23 #54818</a></p>



<a name="194969414"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/194969414" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Santiago Pastorino <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#194969414">(Apr 22 2020 at 18:03)</a>:</h4>
<p>we are supposed to have checkins from <span class="user-group-mention" data-user-group-id="1117">@WG-parallel-rustc</span> and <span class="user-group-mention" data-user-group-id="1184">@WG-polonius</span></p>



<a name="194969498"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/194969498" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Santiago Pastorino <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#194969498">(Apr 22 2020 at 18:04)</a>:</h4>
<p><span class="user-mention" data-user-id="116122">@simulacrum</span> <span class="user-mention" data-user-id="116009">@nikomatsakis</span> I don't think there's stuff going on about parallel, right?</p>



<a name="194969539"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/194969539" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#194969539">(Apr 22 2020 at 18:04)</a>:</h4>
<p>not right this minute</p>



<a name="194969571"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/194969571" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Santiago Pastorino <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#194969571">(Apr 22 2020 at 18:04)</a>:</h4>
<p><span class="user-mention" data-user-id="116113">@lqd</span> is there something to share about polonius?</p>



<a name="194969643"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/194969643" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> lqd <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#194969643">(Apr 22 2020 at 18:05)</a>:</h4>
<p><span class="user-mention" data-user-id="116266">@Santiago Pastorino</span> I very likely won't be able to attend the meeting, but I can provide an update :)</p>



<a name="194969762"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/194969762" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> lqd <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#194969762">(Apr 22 2020 at 18:06)</a>:</h4>
<p>I'll prepare that now</p>



<a name="194969992"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/194969992" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Santiago Pastorino <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#194969992">(Apr 22 2020 at 18:08)</a>:</h4>
<p>we are preparing the <a href="https://hackmd.io/sUmyIVXkSvmLzy7KKKjExg?view" title="https://hackmd.io/sUmyIVXkSvmLzy7KKKjExg?view">agenda here</a></p>



<a name="194978584"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/194978584" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> lqd <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#194978584">(Apr 22 2020 at 19:19)</a>:</h4>
<p><span class="user-mention" data-user-id="116266">@Santiago Pastorino</span> here's the update we have for you :)</p>
<div class="codehilite"><pre><span></span>The Polonius WG has many threads of ongoing work but our strategy is still to first achieve completeness/correctness to match rustc&#39;s
existing NLL analyses.

Towards that goal, we have:
- landed universal region errors in both polonius and rustc a while back; (and we&#39;ve kept working on computing these
errors in all of the polonius variants, but that&#39;s a piece of work more related to performance than completeness)
- and we are currently working towards one of the last missing pieces, computing move errors:
part of this work has landed in polonius itself
already, but we haven&#39;t yet done the rustc counterpart -- polonius will compute move errors, but rustc doesn&#39;t
emit those just yet, instead of the ones it computes on its own.
(That also means that this part of the work has not been fully tested yet and we expect to iterate on this)
- after that, some interaction with chalk will be needed to handle subtyping involving higher-ranked types, which is the
last big piece of work remaining (but mostly on the chalk side, rather than polonius)

- We have worked towards fixing the 2 OOM errors happening in rustc tests under `-Z polonius`: the cause is known and we have
a tentative fix for it but no PRs yet as it currently moves the OOMs from rustc to polonius, and that will be taken care of
while finishing up the move errors work.

- On a more administrative note: most of the WG members don&#39;t have a lot of time to dedicate to it, so we&#39;re trying to
organize differently. The weekly meeting has been postponed in favor of a more periodical model (a small scale All Hands),
where we instead gather for a few mornings/days once every few months to achieve bigger pieces of work together.
We&#39;ve done one of these already, and were hoping to have another one soon-ish.
</pre></div>



<a name="194978997"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/194978997" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> lqd <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#194978997">(Apr 22 2020 at 19:22)</a>:</h4>
<p>(if there are any questions though, I'll make sure to reply as I'm finished with work, but of course Niko will be there)</p>



<a name="195062047"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195062047" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Santiago Pastorino <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195062047">(Apr 23 2020 at 13:41)</a>:</h4>
<p>Hi <span class="user-group-mention" data-user-group-id="897">@T-compiler/meeting</span>, our meeting starts in 19 minutes, you can check out the <a href="https://hackmd.io/sUmyIVXkSvmLzy7KKKjExg?view" title="https://hackmd.io/sUmyIVXkSvmLzy7KKKjExg?view">agenda here</a></p>



<a name="195063813"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195063813" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195063813">(Apr 23 2020 at 13:54)</a>:</h4>
<p><span class="user-mention silent" data-user-id="116113">lqd</span> <a href="#narrow/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818/near/194978997" title="#narrow/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818/near/194978997">said</a>:</p>
<blockquote>
<p>(if there are any questions though, I'll make sure to reply as I'm finished with work, but of course Niko will be there)</p>
</blockquote>
<p>(in fact Niko is absent today and tomorrow. but someone will answer your questions ... eventually...)</p>



<a name="195064321"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195064321" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> eddyb <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195064321">(Apr 23 2020 at 13:58)</a>:</h4>
<p>I've also been kind of absent but I'll try to be here today. PM me for anything urgent, I won't get to GH notifications until next week I don't think</p>



<a name="195064769"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195064769" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195064769">(Apr 23 2020 at 14:02)</a>:</h4>
<p>Hi <span class="user-group-mention" data-user-group-id="897">@T-compiler/meeting</span>! Add a <span aria-label="wave" class="emoji emoji-1f44b" role="img" title="wave">:wave:</span> emoji to show you're here :)</p>



<a name="195064839"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195064839" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195064839">(Apr 23 2020 at 14:02)</a>:</h4>
<p>We'll start off with five minutes for ...</p>



<a name="195064846"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195064846" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195064846">(Apr 23 2020 at 14:02)</a>:</h4>
<h2>Announcements</h2>



<a name="195064912"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195064912" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195064912">(Apr 23 2020 at 14:02)</a>:</h4>
<ul>
<li>My machine is pretty pokey today, and github has been having issues too on their side, so today's meeting is going to be ... interesting ...</li>
</ul>



<a name="195064954"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195064954" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195064954">(Apr 23 2020 at 14:03)</a>:</h4>
<ul>
<li>Today we are releasing Rust 1.43.0</li>
</ul>



<a name="195064977"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195064977" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195064977">(Apr 23 2020 at 14:03)</a>:</h4>
<ul>
<li>Tomorrow (Friday) we will have a compiler team meeting about <a href="https://github.com/rust-lang/compiler-team/issues/267" title="https://github.com/rust-lang/compiler-team/issues/267">"Standard library implementation ownership" #267</a></li>
</ul>



<a name="195064987"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195064987" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195064987">(Apr 23 2020 at 14:03)</a>:</h4>
<ul>
<li>My machine has also been sort of slow for some reason, and due to github being down we don't yet have that release going, but soon(tm)</li>
</ul>



<a name="195065105"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195065105" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195065105">(Apr 23 2020 at 14:04)</a>:</h4>
<ul>
<li>as I mentioned above, niko is out today and tomorrow, so I will be taking the reins for tomorrow's steering meeting (<a href="https://github.com/rust-lang/compiler-team/issues/267" title="https://github.com/rust-lang/compiler-team/issues/267">compiler-team#267</a>, mentioned above)</li>
</ul>



<a name="195065236"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195065236" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195065236">(Apr 23 2020 at 14:05)</a>:</h4>
<ul>
<li>There are 5 major changes proposals<ul>
<li><a href="https://github.com/rust-lang/compiler-team/issues/277" title="https://github.com/rust-lang/compiler-team/issues/277">Decentralize queries #277</a></li>
<li><a href="https://github.com/rust-lang/compiler-team/issues/276" title="https://github.com/rust-lang/compiler-team/issues/276">Major change proposal: Support collecting all identifiers encountered during compilation #276</a></li>
<li><a href="https://github.com/rust-lang/compiler-team/issues/274" title="https://github.com/rust-lang/compiler-team/issues/274">Move <code>src/test/run-fail</code> tests to UI #274</a></li>
<li><a href="https://github.com/rust-lang/compiler-team/issues/270" title="https://github.com/rust-lang/compiler-team/issues/270">Integration of the Cranelift backend with rustc #270</a></li>
<li><a href="https://github.com/rust-lang/compiler-team/issues/233" title="https://github.com/rust-lang/compiler-team/issues/233">[major change] MIR librarification #233</a></li>
</ul>
</li>
</ul>
<p>If you have feedback or objections on any of the above, or would like to second one or volunteer to be the reviewer, then please leave comments on the relevant issue</p>



<a name="195065309"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195065309" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195065309">(Apr 23 2020 at 14:05)</a>:</h4>
<p>(or in the associated zulip topic under <a class="stream" data-stream-id="233931" href="/#narrow/stream/233931-t-compiler.2Fmajor-changes">#t-compiler/major changes</a> )</p>



<a name="195065338"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195065338" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195065338">(Apr 23 2020 at 14:05)</a>:</h4>
<p>(remember <code>@rustbot seconded</code> on the github thread is the way to second)</p>



<a name="195065381"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195065381" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> eddyb <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195065381">(Apr 23 2020 at 14:05)</a>:</h4>
<p>the only thing I'd like to point out is that we should have a standard naming scheme :P</p>



<a name="195065481"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195065481" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> eddyb <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195065481">(Apr 23 2020 at 14:06)</a>:</h4>
<p>(RFCs have had this problem for a while, we just don't look at PR titles for them a lot listed like that)</p>



<a name="195065482"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195065482" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195065482">(Apr 23 2020 at 14:06)</a>:</h4>
<p>time to make a meta MCP!</p>



<a name="195065565"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195065565" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195065565">(Apr 23 2020 at 14:07)</a>:</h4>
<p>Its certainly something we can try to do for the agenda itself, but it would make sense to also do it consistently on the issue titles themselves</p>



<a name="195065782"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195065782" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195065782">(Apr 23 2020 at 14:08)</a>:</h4>
<p>okay so lets move along then</p>



<a name="195065876"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195065876" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195065876">(Apr 23 2020 at 14:09)</a>:</h4>
<p>Normally on a release day we wouldn't have any beta nominations, but today is exceptional in so many respects...</p>



<a name="195065903"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195065903" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195065903">(Apr 23 2020 at 14:09)</a>:</h4>
<p>namely, we have a beta-nom: - "[beta] fix failing const validation" <a href="https://github.com/rust-lang/rust/pull/71441" title="https://github.com/rust-lang/rust/pull/71441">#71441</a></p>



<a name="195065920"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195065920" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195065920">(Apr 23 2020 at 14:09)</a>:</h4>
<p>this is not a backport; it is a revert</p>



<a name="195065950"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195065950" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195065950">(Apr 23 2020 at 14:09)</a>:</h4>
<p>is <span class="user-mention" data-user-id="120791">@RalfJ</span> here? I'm curious why we don't just go ahead and revert on master too?</p>



<a name="195066008"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195066008" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195066008">(Apr 23 2020 at 14:10)</a>:</h4>
<p>rather than let beta and master diverge so much?</p>



<a name="195066059"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195066059" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Santiago Pastorino <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195066059">(Apr 23 2020 at 14:10)</a>:</h4>
<p>he has mentioned on the issue that a proper fix for master is being cooked</p>



<a name="195066106"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195066106" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Santiago Pastorino <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195066106">(Apr 23 2020 at 14:11)</a>:</h4>
<p>but given the time constraints I guess he thought would be safer to revert for beta instead of risking too much ?</p>



<a name="195066109"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195066109" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195066109">(Apr 23 2020 at 14:11)</a>:</h4>
<p>yeah, but, ... so what?</p>



<a name="195066123"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195066123" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> eddyb <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195066123">(Apr 23 2020 at 14:11)</a>:</h4>
<p>oh heh this is const-prop again</p>



<a name="195066141"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195066141" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195066141">(Apr 23 2020 at 14:11)</a>:</h4>
<p>What i mean is: we could <em>still</em> revert on master</p>



<a name="195066153"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195066153" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> eddyb <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195066153">(Apr 23 2020 at 14:11)</a>:</h4>
<p>this is for post-release beta, right?</p>



<a name="195066159"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195066159" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195066159">(Apr 23 2020 at 14:11)</a>:</h4>
<p>and reland the original PR along with its fixes</p>



<a name="195066201"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195066201" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195066201">(Apr 23 2020 at 14:11)</a>:</h4>
<p><span class="user-mention" data-user-id="119009">@eddyb</span> that's my understanding, yes. As in, not something that is going to end up in the release</p>



<a name="195066262"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195066262" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> eddyb <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195066262">(Apr 23 2020 at 14:12)</a>:</h4>
<p>then yeah let's land the revert on master then backport it to beta</p>



<a name="195066307"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195066307" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> eddyb <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195066307">(Apr 23 2020 at 14:12)</a>:</h4>
<p>also it's tiny so it won't hurt anything to do the revert</p>



<a name="195066344"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195066344" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Santiago Pastorino <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195066344">(Apr 23 2020 at 14:12)</a>:</h4>
<p>yeah, makes sense</p>



<a name="195066350"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195066350" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195066350">(Apr 23 2020 at 14:12)</a>:</h4>
<p>I agree with <span class="user-mention" data-user-id="119009">@eddyb</span> here. Without more explicit explanation of why not to revert on master, I think that is the way to go</p>



<a name="195066418"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195066418" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> eddyb <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195066418">(Apr 23 2020 at 14:13)</a>:</h4>
<p>maybe I should go through <code>const-prop</code> and do an in-depth review, although it would've been helpful to do this <em>before</em> all the ICEs it caused :P</p>



<a name="195066448"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195066448" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195066448">(Apr 23 2020 at 14:13)</a>:</h4>
<p>We can approve the backport today though, right? Doesn't seem like it makes sense to wait on that</p>



<a name="195066449"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195066449" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> eddyb <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195066449">(Apr 23 2020 at 14:13)</a>:</h4>
<p>but I have to say, <code>if rvalue.needs_subst() {</code> looks very suspicious :P</p>



<a name="195066464"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195066464" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195066464">(Apr 23 2020 at 14:13)</a>:</h4>
<p>(A troubling aspect to this is that the PR itself is failing for some reason; its suspected to be spurious failures, but <span class="user-mention" data-user-id="120791">@RalfJ</span> mentioned something about how all three builders failed in the reattempt</p>



<a name="195066501"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195066501" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195066501">(Apr 23 2020 at 14:13)</a>:</h4>
<p><span class="user-mention" data-user-id="116122">@simulacrum</span> I also think we can approve the backport today too</p>



<a name="195066519"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195066519" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195066519">(Apr 23 2020 at 14:13)</a>:</h4>
<p>I'm just saying we should land the revert on master as well</p>



<a name="195066530"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195066530" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195066530">(Apr 23 2020 at 14:13)</a>:</h4>
<p>build failure is definitely not related to pr</p>



<a name="195066619"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195066619" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195066619">(Apr 23 2020 at 14:14)</a>:</h4>
<p>yes, I would agree with that (presuming there's not a pr fixing master properly in the same timeframe as we can prepare a revert, I guess)</p>



<a name="195066647"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195066647" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195066647">(Apr 23 2020 at 14:14)</a>:</h4>
<p>Okay seems like no one present is going to object. I can prepare a revert on master to match what <span class="user-mention" data-user-id="120791">@RalfJ</span> did in PR <a href="https://github.com/rust-lang/rust/issues/71441" title="https://github.com/rust-lang/rust/issues/71441">#71441</a>.</p>



<a name="195066683"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195066683" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195066683">(Apr 23 2020 at 14:14)</a>:</h4>
<p>lets move on then</p>



<a name="195066726"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195066726" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195066726">(Apr 23 2020 at 14:15)</a>:</h4>
<p>there are no stable backport nominations</p>



<a name="195066787"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195066787" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195066787">(Apr 23 2020 at 14:15)</a>:</h4>
<p>There are two T-compiler PR's marked <a href="http://(https://github.com/rust-lang/rust/pulls?utf8=%E2%9C%93&amp;q=is%3Aopen+label%3AS-waiting-on-team+label%3AT-compiler+)" title="http://(https://github.com/rust-lang/rust/pulls?utf8=%E2%9C%93&amp;q=is%3Aopen+label%3AS-waiting-on-team+label%3AT-compiler+)">S-waiting-on-team</a></p>



<a name="195066826"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195066826" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195066826">(Apr 23 2020 at 14:15)</a>:</h4>
<p>waiting 1/2: "Add Option to Force Unwind Tables" <a href="https://github.com/rust-lang/rust/pull/69984" title="https://github.com/rust-lang/rust/pull/69984">#69984</a></p>



<a name="195066901"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195066901" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195066901">(Apr 23 2020 at 14:16)</a>:</h4>
<p>(status: FCP finished, disposition merge.) So this is just a general heads up to everyone</p>



<a name="195066923"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195066923" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195066923">(Apr 23 2020 at 14:16)</a>:</h4>
<p>waiting 2/2: "Remove -Z no-landing-pads flag" <a href="https://github.com/rust-lang/rust/pull/70175" title="https://github.com/rust-lang/rust/pull/70175">#70175</a></p>



<a name="195066961"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195066961" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195066961">(Apr 23 2020 at 14:16)</a>:</h4>
<p>(status: FCP finished, disposition merge.) So the same deal here.</p>



<a name="195067012"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195067012" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195067012">(Apr 23 2020 at 14:16)</a>:</h4>
<p>And that takes us to what I think will be the bulk of today's meeting: The "Issues of Note"</p>



<a name="195067047"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195067047" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195067047">(Apr 23 2020 at 14:17)</a>:</h4>
<h3>Short Summary</h3>
<ul>
<li><a href="https://github.com/rust-lang/rust/issues?utf8=%E2%9C%93&amp;q=is%3Aopen+is%3Aissue+label%3AT-compiler+label%3AP-critical+" title="https://github.com/rust-lang/rust/issues?utf8=%E2%9C%93&amp;q=is%3Aopen+is%3Aissue+label%3AT-compiler+label%3AP-critical+">1 P-critical issues</a> (same as last week)</li>
<li><a href="https://github.com/rust-lang/rust/issues?utf8=%E2%9C%93&amp;q=is%3Aopen+is%3Aissue+label%3AT-compiler+label%3AP-high+" title="https://github.com/rust-lang/rust/issues?utf8=%E2%9C%93&amp;q=is%3Aopen+is%3Aissue+label%3AT-compiler+label%3AP-high+">43 P-high issues</a> (2 less than last week)<ul>
<li><a href="https://github.com/rust-lang/rust/issues?utf8=%E2%9C%93&amp;q=is%3Aopen+is%3Aissue+label%3AT-compiler+label%3AP-high+no%3Aassignee" title="https://github.com/rust-lang/rust/issues?utf8=%E2%9C%93&amp;q=is%3Aopen+is%3Aissue+label%3AT-compiler+label%3AP-high+no%3Aassignee">22 of those are unassigned</a> (4 less than last week)</li>
</ul>
</li>
<li><a href="https://github.com/rust-lang/rust/labels/regression-from-stable-to-beta" title="https://github.com/rust-lang/rust/labels/regression-from-stable-to-beta">1 P-high, 2 P-medium, 1 P-low, 2 T-libs and 1 T-rustdoc regression-from-stable-to-beta</a><ul>
<li>The only assigned is the P-high one. One of the T-libs and the T-rustdoc are unassigned.</li>
</ul>
</li>
<li><a href="https://github.com/rust-lang/rust/labels/regression-from-stable-to-nightly" title="https://github.com/rust-lang/rust/labels/regression-from-stable-to-nightly">3 P-high, 3 P-medium, 1 P-low and 1 T-libs regression-from-stable-to-nightly</a><ul>
<li>Only 2 P-high are assigned.</li>
</ul>
</li>
<li><a href="https://github.com/rust-lang/rust/labels/regression-from-stable-to-stable" title="https://github.com/rust-lang/rust/labels/regression-from-stable-to-stable">69 regression-from-stable-to-stable</a><ul>
<li><a href="https://github.com/rust-lang/rust/issues?q=is%3Aopen+label%3Aregression-from-stable-to-stable+-label%3AP-critical+-label%3AP-high+-label%3AP-medium+-label%3AP-low" title="https://github.com/rust-lang/rust/issues?q=is%3Aopen+label%3Aregression-from-stable-to-stable+-label%3AP-critical+-label%3AP-high+-label%3AP-medium+-label%3AP-low">24 of those are not prioritized</a>.</li>
</ul>
</li>
</ul>



<a name="195067080"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195067080" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> eddyb <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195067080">(Apr 23 2020 at 14:17)</a>:</h4>
<p>nice</p>



<a name="195067100"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195067100" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Wesley Wiser <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195067100">(Apr 23 2020 at 14:17)</a>:</h4>
<p>The <code>P-critical</code> issue has a pr waiting to merge (thanks <span class="user-mention" data-user-id="124288">@oli</span>!)</p>



<a name="195067145"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195067145" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195067145">(Apr 23 2020 at 14:17)</a>:</h4>
<p>(thank's to <span class="user-group-mention" data-user-group-id="2403">@WG-prioritization</span> for putting that summary together, as well as the whole agenda for today)</p>



<a name="195067206"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195067206" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195067206">(Apr 23 2020 at 14:18)</a>:</h4>
<p>right</p>



<a name="195067276"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195067276" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195067276">(Apr 23 2020 at 14:18)</a>:</h4>
<p>There is only one thing I think we might discuss regarding the P-critical issue</p>



<a name="195067295"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195067295" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195067295">(Apr 23 2020 at 14:18)</a>:</h4>
<p>which is in the agenda:</p>



<a name="195067318"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195067318" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195067318">(Apr 23 2020 at 14:18)</a>:</h4>
<p>- This is <code>P-critical</code> but is not going to be included in 1.43.0. <code>P-critical</code> means that it potentially blocks the release and this time it didn't block it.<br>
  - Should this one be beta-nominated after the nightly to beta promotion happens? (If PR <a href="https://github.com/rust-lang/rust/issues/71078" title="https://github.com/rust-lang/rust/issues/71078">#71078</a> lands before promotion then point is moot.)</p>



<a name="195067393"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195067393" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195067393">(Apr 23 2020 at 14:19)</a>:</h4>
<p><span class="user-mention" data-user-id="116122">@simulacrum</span> the nightly to beta promotion has already happened, right? Otherwise we wouldn't have had that previous discussion of <span class="user-mention" data-user-id="120791">@RalfJ</span> 's revert PR?</p>



<a name="195067409"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195067409" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195067409">(Apr 23 2020 at 14:19)</a>:</h4>
<p>yes</p>



<a name="195067486"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195067486" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> eddyb <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195067486">(Apr 23 2020 at 14:20)</a>:</h4>
<p>this also means stable-to-stable regressions were stable-to-beta days ago?</p>



<a name="195067543"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195067543" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195067543">(Apr 23 2020 at 14:20)</a>:</h4>
<p>I don't know if we've updated the stable-to-beta regressions to be stable-to-stable already</p>



<a name="195067569"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195067569" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195067569">(Apr 23 2020 at 14:20)</a>:</h4>
<p>that might only happen after the release itself...?</p>



<a name="195067594"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195067594" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Santiago Pastorino <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195067594">(Apr 23 2020 at 14:20)</a>:</h4>
<p><span class="user-mention silent" data-user-id="116083">pnkfelix</span> <a href="#narrow/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818/near/195067047" title="#narrow/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818/near/195067047">said</a>:</p>
<blockquote>
<h3>Short Summary</h3>
<ul>
<li><a href="https://github.com/rust-lang/rust/issues?utf8=%E2%9C%93&amp;q=is%3Aopen+is%3Aissue+label%3AT-compiler+label%3AP-critical+" title="https://github.com/rust-lang/rust/issues?utf8=%E2%9C%93&amp;q=is%3Aopen+is%3Aissue+label%3AT-compiler+label%3AP-critical+">1 P-critical issues</a> (same as last week)</li>
<li><a href="https://github.com/rust-lang/rust/issues?utf8=%E2%9C%93&amp;q=is%3Aopen+is%3Aissue+label%3AT-compiler+label%3AP-high+" title="https://github.com/rust-lang/rust/issues?utf8=%E2%9C%93&amp;q=is%3Aopen+is%3Aissue+label%3AT-compiler+label%3AP-high+">43 P-high issues</a> (2 less than last week)<ul>
<li><a href="https://github.com/rust-lang/rust/issues?utf8=%E2%9C%93&amp;q=is%3Aopen+is%3Aissue+label%3AT-compiler+label%3AP-high+no%3Aassignee" title="https://github.com/rust-lang/rust/issues?utf8=%E2%9C%93&amp;q=is%3Aopen+is%3Aissue+label%3AT-compiler+label%3AP-high+no%3Aassignee">22 of those are unassigned</a> (4 less than last week)</li>
</ul>
</li>
<li><a href="https://github.com/rust-lang/rust/labels/regression-from-stable-to-beta" title="https://github.com/rust-lang/rust/labels/regression-from-stable-to-beta">1 P-high, 2 P-medium, 1 P-low, 2 T-libs and 1 T-rustdoc regression-from-stable-to-beta</a><ul>
<li>The only assigned is the P-high one. One of the T-libs and the T-rustdoc are unassigned.</li>
</ul>
</li>
<li><a href="https://github.com/rust-lang/rust/labels/regression-from-stable-to-nightly" title="https://github.com/rust-lang/rust/labels/regression-from-stable-to-nightly">3 P-high, 3 P-medium, 1 P-low and 1 T-libs regression-from-stable-to-nightly</a><ul>
<li>Only 2 P-high are assigned.</li>
</ul>
</li>
<li><a href="https://github.com/rust-lang/rust/labels/regression-from-stable-to-stable" title="https://github.com/rust-lang/rust/labels/regression-from-stable-to-stable">69 regression-from-stable-to-stable</a><ul>
<li><a href="https://github.com/rust-lang/rust/issues?q=is%3Aopen+label%3Aregression-from-stable-to-stable+-label%3AP-critical+-label%3AP-high+-label%3AP-medium+-label%3AP-low" title="https://github.com/rust-lang/rust/issues?q=is%3Aopen+label%3Aregression-from-stable-to-stable+-label%3AP-critical+-label%3AP-high+-label%3AP-medium+-label%3AP-low">24 of those are not prioritized</a>.</li>
</ul>
</li>
</ul>
</blockquote>
<p>one thing that I wanted to note about this is that we are consistenly taking the <code>P-high</code> count down, which is great :). Keep fixing stuff :).</p>



<a name="195067664"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195067664" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> eddyb <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195067664">(Apr 23 2020 at 14:21)</a>:</h4>
<p>that is, are the 24 unprioritized ones left over from the past 6 weeks?</p>



<a name="195067700"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195067700" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> eddyb <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195067700">(Apr 23 2020 at 14:21)</a>:</h4>
<p>I could just open one and see :P</p>



<a name="195067704"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195067704" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195067704">(Apr 23 2020 at 14:21)</a>:</h4>
<p><span class="user-mention silent" data-user-id="116083">pnkfelix</span> <a href="#narrow/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818/near/195067569" title="#narrow/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818/near/195067569">said</a>:</p>
<blockquote>
<p>that might only happen after the release itself...?</p>
</blockquote>
<p>(and I don't think you'd want to update the stable-to-nightly labels to be stable-to-beta until <em>after</em> you've taken care of updating the stable-to-beta ones to be stable-to-stable...)</p>



<a name="195067812"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195067812" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195067812">(Apr 23 2020 at 14:22)</a>:</h4>
<p>we haven't yet automated stable-to* regression label switching, I don't know if we've done that manually. I've never done it in the past but it has presumably "magically" happened thanks to some hardworking triagers</p>



<a name="195067813"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195067813" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195067813">(Apr 23 2020 at 14:22)</a>:</h4>
<p><span class="user-mention silent" data-user-id="119009">eddyb</span> <a href="#narrow/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818/near/195067664" title="#narrow/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818/near/195067664">said</a>:</p>
<blockquote>
<p>that is, are the 24 unprioritized ones left over from the past 6 weeks?</p>
</blockquote>
<p>I think we tend to be pretty good at prioiritizing all stable-to-beta and stable-to-nightly regressions</p>



<a name="195067847"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195067847" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> eddyb <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195067847">(Apr 23 2020 at 14:22)</a>:</h4>
<p>ah that explains it, thanks!</p>



<a name="195067875"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195067875" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195067875">(Apr 23 2020 at 14:22)</a>:</h4>
<p>so I was assuming that all the unprioritized stable-to-stable regressions are not recent injections</p>



<a name="195067953"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195067953" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Santiago Pastorino <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195067953">(Apr 23 2020 at 14:23)</a>:</h4>
<p>yeah those are not recent, just 4 of them are from this year and just 1 of those <code>T-compiler</code></p>



<a name="195068009"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195068009" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195068009">(Apr 23 2020 at 14:23)</a>:</h4>
<p>Anyway, regarding PR <a href="https://github.com/rust-lang/rust/issues/71078" title="https://github.com/rust-lang/rust/issues/71078">#71078</a>, I think my attitude there is that I <em>will</em> beta nominate it, but we do not need to discuss its backport this week</p>



<a name="195068079"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195068079" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195068079">(Apr 23 2020 at 14:24)</a>:</h4>
<p>that's the only P-critical bug</p>



<a name="195068086"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195068086" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195068086">(Apr 23 2020 at 14:24)</a>:</h4>
<p>next up:</p>



<a name="195068092"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195068092" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195068092">(Apr 23 2020 at 14:24)</a>:</h4>
<h3>Unassigned P-high regressions</h3>
<ul>
<li>"<code>broken MIR</code> <code>NoSolution</code> sized array initialiser with addition in generic tuple destructure" <a href="https://github.com/rust-lang/rust/issues/71344" title="https://github.com/rust-lang/rust/issues/71344">#71344</a></li>
</ul>



<a name="195068185"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195068185" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195068185">(Apr 23 2020 at 14:25)</a>:</h4>
<p>injected by PR <a href="https://github.com/rust-lang/rust/issues/70452" title="https://github.com/rust-lang/rust/issues/70452">#70452</a> according to bisection</p>



<a name="195068208"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195068208" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195068208">(Apr 23 2020 at 14:25)</a>:</h4>
<p><span class="user-mention" data-user-id="119009">@eddyb</span>  do you want to look at this one?</p>



<a name="195068297"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195068297" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> eddyb <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195068297">(Apr 23 2020 at 14:26)</a>:</h4>
<p>huh, I would've expected crater to find all such bugs</p>



<a name="195068378"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195068378" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195068378">(Apr 23 2020 at 14:26)</a>:</h4>
<p>there were a lot of intersecting requirements in the MCVE</p>



<a name="195068442"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195068442" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Santiago Pastorino <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195068442">(Apr 23 2020 at 14:26)</a>:</h4>
<p><span class="user-mention" data-user-id="119009">@eddyb</span> if you need help I can take a look at it and ask you questions if it's fine to you</p>



<a name="195068445"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195068445" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195068445">(Apr 23 2020 at 14:26)</a>:</h4>
<p>anyway I'll assign to <span class="user-mention" data-user-id="119009">@eddyb</span> for now; if you have too much on your plate, <span class="user-mention" data-user-id="119009">@eddyb</span> , let me know and we can work on reassigning</p>



<a name="195068489"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195068489" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> eddyb <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195068489">(Apr 23 2020 at 14:27)</a>:</h4>
<p>I have nothing on my plate until I open GH notifications again :P</p>



<a name="195068561"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195068561" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> eddyb <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195068561">(Apr 23 2020 at 14:27)</a>:</h4>
<p><span class="user-mention" data-user-id="116266">@Santiago Pastorino</span> thanks, that might be the best way to deal with this quickly</p>



<a name="195068578"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195068578" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> eddyb <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195068578">(Apr 23 2020 at 14:27)</a>:</h4>
<p>/me goes to write a comment on the issue</p>



<a name="195068660"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195068660" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195068660">(Apr 23 2020 at 14:28)</a>:</h4>
<p>okay, we have three nominated issues on the agenda</p>



<a name="195068706"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195068706" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Santiago Pastorino <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195068706">(Apr 23 2020 at 14:28)</a>:</h4>
<p><span class="user-mention silent" data-user-id="119009">eddyb</span> <a href="#narrow/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818/near/195068561" title="#narrow/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818/near/195068561">said</a>:</p>
<blockquote>
<p><span class="user-mention silent" data-user-id="116266">Santiago Pastorino</span> thanks, that might be the best way to deal with this quickly</p>
</blockquote>
<p><span aria-label="+1" class="emoji emoji-1f44d" role="img" title="+1">:+1:</span>, feel free to assign to me then</p>



<a name="195068710"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195068710" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195068710">(Apr 23 2020 at 14:28)</a>:</h4>
<p>nom 1/3: "<code>unsized_locals</code> fails to uphold alignment requirements" <a href="https://github.com/rust-lang/rust/issues/71416" title="https://github.com/rust-lang/rust/issues/71416">#71416</a></p>
<p>- We need to discuss about a possible solution for this one.</p>



<a name="195068794"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195068794" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> oli <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195068794">(Apr 23 2020 at 14:29)</a>:</h4>
<p>cc <span class="user-mention" data-user-id="120791">@RalfJ</span> ^</p>



<a name="195068799"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195068799" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195068799">(Apr 23 2020 at 14:29)</a>:</h4>
<p>I like this remark from <span class="user-mention" data-user-id="120791">@RalfJ</span> : "Unlike the other unsound features, this is one where we don't even have a plan for how to soundly implement it. Not sure how much I like keeping that around."</p>



<a name="195068968"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195068968" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Santiago Pastorino <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195068968">(Apr 23 2020 at 14:30)</a>:</h4>
<p>so, I guess the most interested people in discussing this are <span class="user-mention" data-user-id="120791">@RalfJ</span> and <span class="user-mention" data-user-id="116009">@nikomatsakis</span> but given they are not around I guess we could also leave this nomination up for next meeting and try to have <span class="user-mention" data-user-id="120791">@RalfJ</span> around?</p>



<a name="195069054"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195069054" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195069054">(Apr 23 2020 at 14:31)</a>:</h4>
<p>and to clarify, I think this is the big issue (from a comment from niko): "part of the challenge here is that the alignment of a dyn Value is totally unknown -- it's not like we can conservatively align to 64 bytes or something."</p>



<a name="195069076"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195069076" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> eddyb <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195069076">(Apr 23 2020 at 14:31)</a>:</h4>
<p>leaving a comment now</p>



<a name="195069086"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195069086" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nagisa <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195069086">(Apr 23 2020 at 14:31)</a>:</h4>
<p>unsized_locals is unstable, right?</p>



<a name="195069114"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195069114" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195069114">(Apr 23 2020 at 14:31)</a>:</h4>
<p><span class="user-mention" data-user-id="123586">@nagisa</span> that's right, this is all under a feature gate</p>



<a name="195069143"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195069143" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195069143">(Apr 23 2020 at 14:31)</a>:</h4>
<p>There is concurrent discussion in the issue of splitting it into two separate feature-gates</p>



<a name="195069221"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195069221" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195069221">(Apr 23 2020 at 14:32)</a>:</h4>
<p>so that we could distinguish the part we actually know how to implement from the other nonsense</p>



<a name="195069266"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195069266" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195069266">(Apr 23 2020 at 14:32)</a>:</h4>
<p><span class="user-mention" data-user-id="119009">@eddyb</span> can you dynamically query a dyn Value for its alignment?</p>



<a name="195069277"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195069277" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> eddyb <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195069277">(Apr 23 2020 at 14:32)</a>:</h4>
<p>I'm surprised we landed the <code>Box&lt;dyn FnOnce()&gt;</code> change w/o a separate feature gate</p>



<a name="195069310"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195069310" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195069310">(Apr 23 2020 at 14:32)</a>:</h4>
<p>or is that info not in the vtable?</p>



<a name="195069318"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195069318" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> eddyb <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195069318">(Apr 23 2020 at 14:32)</a>:</h4>
<p><span class="user-mention" data-user-id="116083">@pnkfelix</span> ofc, IIRC you even implemented the correct field offset logic that uses dynamic alignment :P</p>



<a name="195069332"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195069332" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> eddyb <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195069332">(Apr 23 2020 at 14:32)</a>:</h4>
<p>but also, <code>align_of_val</code> is a thing</p>



<a name="195069339"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195069339" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195069339">(Apr 23 2020 at 14:33)</a>:</h4>
<p>hell if I remember that</p>



<a name="195069367"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195069367" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> oli <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195069367">(Apr 23 2020 at 14:33)</a>:</h4>
<p><span class="user-mention silent" data-user-id="116083">pnkfelix</span> <a href="#narrow/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818/near/195069266" title="#narrow/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818/near/195069266">said</a>:</p>
<blockquote>
<p>can you dynamically query a dyn Value for its alignment?</p>
</blockquote>
<p>yes, but the LLVM <code>alloca</code> can't take dynamic alignment</p>



<a name="195069371"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195069371" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195069371">(Apr 23 2020 at 14:33)</a>:</h4>
<p>so its not like we <em>can't</em> fall back on using that, right?</p>



<a name="195069376"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195069376" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nagisa <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195069376">(Apr 23 2020 at 14:33)</a>:</h4>
<p><span class="user-mention silent" data-user-id="119009">eddyb</span> <a href="#narrow/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818/near/195069277" title="#narrow/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818/near/195069277">said</a>:</p>
<blockquote>
<p>I'm surprised we landed the <code>Box&lt;dyn FnOnce()&gt;</code> change w/o a separate feature gate</p>
</blockquote>
<p>If you captured a highly aligned variable, wouldn’t the bug in question make it potentially misaligned?</p>



<a name="195069401"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195069401" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195069401">(Apr 23 2020 at 14:33)</a>:</h4>
<p>right, we cannot use a fast <code>alloca</code> path</p>



<a name="195069410"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195069410" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> eddyb <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195069410">(Apr 23 2020 at 14:33)</a>:</h4>
<p>anyway left a comment</p>



<a name="195069436"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195069436" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> eddyb <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195069436">(Apr 23 2020 at 14:33)</a>:</h4>
<p><span class="user-mention" data-user-id="123586">@nagisa</span> there are 0 <code>memcpy</code>s of the <code>dyn FnOnce()</code> left now (when using <code>Box&lt;dyn FnOnce()&gt;</code> from stable code)</p>



<a name="195069464"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195069464" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195069464">(Apr 23 2020 at 14:33)</a>:</h4>
<p>okay, <span class="user-mention" data-user-id="119009">@eddyb</span> left a comment that basically got to what I was thinking of but couldn't express directly</p>



<a name="195069467"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195069467" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> oli <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195069467">(Apr 23 2020 at 14:33)</a>:</h4>
<p>oh, but we can <code>alloca</code> a <code>size + align</code> allocation and manually align</p>



<a name="195069522"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195069522" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> eddyb <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195069522">(Apr 23 2020 at 14:34)</a>:</h4>
<p>that's literally what I wrote in my comment, yes :P</p>



<a name="195069546"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195069546" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195069546">(Apr 23 2020 at 14:34)</a>:</h4>
<p>well, literally off by one</p>



<a name="195069550"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195069550" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> oli <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195069550">(Apr 23 2020 at 14:34)</a>:</h4>
<p>XD</p>



<a name="195069586"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195069586" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195069586">(Apr 23 2020 at 14:34)</a>:</h4>
<p><span aria-label="lol" class="emoji emoji-1f606" role="img" title="lol">:lol:</span></p>



<a name="195069630"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195069630" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195069630">(Apr 23 2020 at 14:34)</a>:</h4>
<p>anyway that's great, glad to get some attention on this</p>



<a name="195069730"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195069730" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195069730">(Apr 23 2020 at 14:35)</a>:</h4>
<p>(I do think it would make sense to divide up the feature gate here, so that we separate the more experimental stuff from the more established stuff)</p>



<a name="195069748"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195069748" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195069748">(Apr 23 2020 at 14:35)</a>:</h4>
<p>but I also think we can move along</p>



<a name="195069794"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195069794" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nagisa <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195069794">(Apr 23 2020 at 14:35)</a>:</h4>
<p>I could make the assert fail in stable</p>



<a name="195069805"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195069805" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195069805">(Apr 23 2020 at 14:35)</a>:</h4>
<p>nom 2/3: "Debuginfo tests are not running" <a href="https://github.com/rust-lang/rust/issues/47163" title="https://github.com/rust-lang/rust/issues/47163">#47163</a></p>
<p>- According to @jonas-schievink, we have not been able to run these tests for over 2 years. There are some PRs by @tromey. It's not clear if <a href="https://github.com/rust-lang/rust/pull/71428" title="https://github.com/rust-lang/rust/pull/71428">#71428</a> fixes this problem entirely or partially.</p>



<a name="195069816"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195069816" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nagisa <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195069816">(Apr 23 2020 at 14:35)</a>:</h4>
<p><a href="https://play.rust-lang.org/?version=stable&amp;mode=debug&amp;edition=2018&amp;gist=d6f0aa4af7af2fa82670dcf0958b5199" title="https://play.rust-lang.org/?version=stable&amp;mode=debug&amp;edition=2018&amp;gist=d6f0aa4af7af2fa82670dcf0958b5199">https://play.rust-lang.org/?version=stable&amp;mode=debug&amp;edition=2018&amp;gist=d6f0aa4af7af2fa82670dcf0958b5199</a></p>



<a name="195069893"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195069893" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> eddyb <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195069893">(Apr 23 2020 at 14:36)</a>:</h4>
<p>oh noes not the debuginfo tests</p>



<a name="195069906"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195069906" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195069906">(Apr 23 2020 at 14:36)</a>:</h4>
<p>ah <span class="user-mention" data-user-id="123586">@nagisa</span> what did you do</p>



<a name="195069924"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195069924" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195069924">(Apr 23 2020 at 14:36)</a>:</h4>
<p>/me looks</p>



<a name="195069946"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195069946" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> eddyb <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195069946">(Apr 23 2020 at 14:36)</a>:</h4>
<p><span class="user-mention" data-user-id="123586">@nagisa</span> but it's fixed on nightly</p>



<a name="195069990"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195069990" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nagisa <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195069990">(Apr 23 2020 at 14:37)</a>:</h4>
<p>Ah good then, never mind me then</p>



<a name="195070049"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195070049" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195070049">(Apr 23 2020 at 14:37)</a>:</h4>
<p>oh right /me looks at first line of <a href="https://github.com/rust-lang/rust/issues/71416" title="https://github.com/rust-lang/rust/issues/71416">#71416</a> again, sees reference to PR <a href="https://github.com/rust-lang/rust/issues/71170" title="https://github.com/rust-lang/rust/issues/71170">#71170</a></p>



<a name="195070105"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195070105" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195070105">(Apr 23 2020 at 14:37)</a>:</h4>
<p>so, back to debuginfo tests</p>



<a name="195070201"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195070201" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> eddyb <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195070201">(Apr 23 2020 at 14:38)</a>:</h4>
<p><span class="user-mention" data-user-id="123586">@nagisa</span> the problems remaining are that the sound thing is not under its own stricter feature-gate (so that core/alloc/std can be kept away from the general feature) and that the general feature is still unsound</p>



<a name="195070339"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195070339" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> eddyb <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195070339">(Apr 23 2020 at 14:39)</a>:</h4>
<p>so I run both gdb and lldb debuginfo tests locally</p>



<a name="195070384"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195070384" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> eddyb <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195070384">(Apr 23 2020 at 14:39)</a>:</h4>
<p>my build command removes one of the tests which crashes lldb</p>



<a name="195070389"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195070389" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nagisa <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195070389">(Apr 23 2020 at 14:39)</a>:</h4>
<p>I never managed to run gdb/lldb tests locally</p>



<a name="195070534"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195070534" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> eddyb <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195070534">(Apr 23 2020 at 14:40)</a>:</h4>
<p>the gdb tests were broken for a long time I believe, until my system gdb was new enough, or something else happened</p>



<a name="195070610"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195070610" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> eddyb <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195070610">(Apr 23 2020 at 14:40)</a>:</h4>
<p>I use locally-built lldb (i.e. via <code>config.toml</code>) which means I have to run a <code>patchelf</code> command to fix a relative RPATH in a python .so, which is broken for some reason, every single time lldb gets rebuilt</p>



<a name="195070705"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195070705" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195070705">(Apr 23 2020 at 14:41)</a>:</h4>
<p><span class="user-mention" data-user-id="119009">@eddyb</span> what does this imply for trying to run these debuginfo tests on CI?</p>



<a name="195070753"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195070753" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> eddyb <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195070753">(Apr 23 2020 at 14:41)</a>:</h4>
<p>I made sure all of this worked locally for MIR debuginfo work, since I didn't trust myself to not break debuginfo :P</p>



<a name="195070762"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195070762" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195070762">(Apr 23 2020 at 14:41)</a>:</h4>
<p>(which is what I assume is the real point of issue <a href="https://github.com/rust-lang/rust/issues/47163" title="https://github.com/rust-lang/rust/issues/47163">#47163</a>)</p>



<a name="195070838"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195070838" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> eddyb <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195070838">(Apr 23 2020 at 14:42)</a>:</h4>
<p>if we don't build <code>lldb</code> on CI already, we would need to. we should see what slowdown that imposes</p>



<a name="195070864"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195070864" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> eddyb <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195070864">(Apr 23 2020 at 14:42)</a>:</h4>
<p>cc <span class="user-mention" data-user-id="116122">@simulacrum</span> <span class="user-mention" data-user-id="121055">@Pietro Albini</span></p>



<a name="195070901"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195070901" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nagisa <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195070901">(Apr 23 2020 at 14:42)</a>:</h4>
<p>The debuginfo tests work and run on CI, this is how most of us get those tests actually run if we end up changing something and don’t test it locally.</p>



<a name="195070908"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195070908" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> eddyb <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195070908">(Apr 23 2020 at 14:42)</a>:</h4>
<p>for GDB, we need to make sure we can get a compatible version</p>



<a name="195070920"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195070920" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> eddyb <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195070920">(Apr 23 2020 at 14:42)</a>:</h4>
<p><span class="user-mention" data-user-id="123586">@nagisa</span> wait so what is the issue about?</p>



<a name="195070932"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195070932" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> eddyb <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195070932">(Apr 23 2020 at 14:42)</a>:</h4>
<p>anymore, I mean</p>



<a name="195070956"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195070956" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> eddyb <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195070956">(Apr 23 2020 at 14:42)</a>:</h4>
<p>as opposed to when it was originally opened</p>



<a name="195070967"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195070967" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nagisa <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195070967">(Apr 23 2020 at 14:42)</a>:</h4>
<p>about being able to run them locally, no?</p>



<a name="195071033"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195071033" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nagisa <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195071033">(Apr 23 2020 at 14:43)</a>:</h4>
<p>ah, tromey is saying that we have ignored/commented out tests</p>



<a name="195071041"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195071041" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195071041">(Apr 23 2020 at 14:43)</a>:</h4>
<p>Hmm I thought it was about the tests that had been disabled</p>



<a name="195071087"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195071087" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nagisa <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195071087">(Apr 23 2020 at 14:43)</a>:</h4>
<p>but if they don’t work on CI, they can’t work locally either, no?</p>



<a name="195071119"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195071119" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195071119">(Apr 23 2020 at 14:43)</a>:</h4>
<p>maybe there are two distinct issues that we need to follow up and perhaps should file distinct tickets for</p>



<a name="195071121"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195071121" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195071121">(Apr 23 2020 at 14:43)</a>:</h4>
<p>I personally feel like this is mostly an issue of someone figuring out what needs to be installed for the tests to work -- I think a more interesting question here might be "what should we support?"</p>



<a name="195071138"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195071138" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> eddyb <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195071138">(Apr 23 2020 at 14:43)</a>:</h4>
<p>some of the builders are running ancient CentOS or something</p>



<a name="195071231"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195071231" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195071231">(Apr 23 2020 at 14:44)</a>:</h4>
<p>only the dist builders run ancient CentOS, test builders should be on recent-ish ubuntu lts I think (and we can bump that without major issues)</p>



<a name="195071252"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195071252" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195071252">(Apr 23 2020 at 14:44)</a>:</h4>
<p>since tromey posed this question, lets maybe quickly look at it here: What version(s) of gdb do we need to support? And how should we go about doing so?</p>



<a name="195071286"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195071286" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> eddyb <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195071286">(Apr 23 2020 at 14:44)</a>:</h4>
<p>I think the problem was that the output changes</p>



<a name="195071287"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195071287" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195071287">(Apr 23 2020 at 14:44)</a>:</h4>
<p>Realistically we can only "support" versions that we have available on CI</p>



<a name="195071317"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195071317" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195071317">(Apr 23 2020 at 14:45)</a>:</h4>
<p><span class="user-mention" data-user-id="119009">@eddyb</span> okay, but we could hypothetically deal with that, right?</p>



<a name="195071329"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195071329" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nagisa <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195071329">(Apr 23 2020 at 14:45)</a>:</h4>
<p>One limiting factor for the range of versions we support is the dwarf version (4) we emit</p>



<a name="195071359"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195071359" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195071359">(Apr 23 2020 at 14:45)</a>:</h4>
<p>I mean, we already have to deal with lldb vs gdb output, right?</p>



<a name="195071392"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195071392" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> eddyb <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195071392">(Apr 23 2020 at 14:45)</a>:</h4>
<p>yeah but when that was brought up before, nobody seemed to want to have even more outputs</p>



<a name="195071405"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195071405" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195071405">(Apr 23 2020 at 14:45)</a>:</h4>
<p>fair</p>



<a name="195071423"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195071423" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> eddyb <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195071423">(Apr 23 2020 at 14:45)</a>:</h4>
<p>maybe if we made them like UI tests and blessable</p>



<a name="195071448"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195071448" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195071448">(Apr 23 2020 at 14:45)</a>:</h4>
<p>I think it's mostly a matter of being pretty annoying to update locally even if they're blessable</p>



<a name="195071499"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195071499" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195071499">(Apr 23 2020 at 14:46)</a>:</h4>
<p>(since you need to go get lots of gdb versions)</p>



<a name="195071558"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195071558" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195071558">(Apr 23 2020 at 14:46)</a>:</h4>
<p>and e.g. on macos gdb installation is a <em>pain</em> since you need to sign it</p>



<a name="195071593"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195071593" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195071593">(Apr 23 2020 at 14:46)</a>:</h4>
<p>yeah I used to build it locally and it was indeed a pain</p>



<a name="195071607"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195071607" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> eddyb <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195071607">(Apr 23 2020 at 14:46)</a>:</h4>
<p>they rarely ever change, though. hmpf</p>



<a name="195071616"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195071616" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> eddyb <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195071616">(Apr 23 2020 at 14:46)</a>:</h4>
<p>yeah I don't know</p>



<a name="195071631"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195071631" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195071631">(Apr 23 2020 at 14:46)</a>:</h4>
<p>so realistically then</p>



<a name="195071642"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195071642" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195071642">(Apr 23 2020 at 14:46)</a>:</h4>
<p>I'm not sure what is in the wild either</p>



<a name="195071649"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195071649" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195071649">(Apr 23 2020 at 14:47)</a>:</h4>
<p>what should we do?</p>



<a name="195071652"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195071652" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> eddyb <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195071652">(Apr 23 2020 at 14:47)</a>:</h4>
<p>anyway, I don't get failures with GDB 9.1 locally but I don't know which tests run via GDB</p>



<a name="195071698"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195071698" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195071698">(Apr 23 2020 at 14:47)</a>:</h4>
<p>e.g. maybe we can just say "We only test whatever is in latest ubuntu lts"</p>



<a name="195071717"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195071717" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> eddyb <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195071717">(Apr 23 2020 at 14:47)</a>:</h4>
<p>i.e. I might just be succeeding because of ignored tests and not realizing</p>



<a name="195071747"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195071747" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195071747">(Apr 23 2020 at 14:47)</a>:</h4>
<p>would it be possible</p>



<a name="195071752"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195071752" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195071752">(Apr 23 2020 at 14:47)</a>:</h4>
<p>to test other versions of gdb</p>



<a name="195071767"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195071767" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> eddyb <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195071767">(Apr 23 2020 at 14:47)</a>:</h4>
<p>one way to find out would probably be to make <code>-Cdebuginfo</code> do nothing in rustc :P</p>



<a name="195071770"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195071770" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195071770">(Apr 23 2020 at 14:47)</a>:</h4>
<p>without inspecting the output?</p>



<a name="195071779"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195071779" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195071779">(Apr 23 2020 at 14:47)</a>:</h4>
<p>maybe that's nuts</p>



<a name="195071839"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195071839" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> eddyb <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195071839">(Apr 23 2020 at 14:48)</a>:</h4>
<p>no, it's not, you'd just e.g. build field access expressions</p>



<a name="195071868"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195071868" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195071868">(Apr 23 2020 at 14:48)</a>:</h4>
<p>I guess I'm just thinking of something like making sure that the debugger doesn't crash before the program gets to the expected point(s)</p>



<a name="195071907"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195071907" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> eddyb <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195071907">(Apr 23 2020 at 14:48)</a>:</h4>
<p>heh have we ever crashed debuggers :P?</p>



<a name="195071910"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195071910" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nagisa <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195071910">(Apr 23 2020 at 14:48)</a>:</h4>
<p>Maybe the concept of having debugger tests (as opposed to debug info tests) is flawed in the first placE?</p>



<a name="195071929"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195071929" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195071929">(Apr 23 2020 at 14:48)</a>:</h4>
<p><span class="user-mention" data-user-id="119009">@eddyb</span> can you say more of what you are thinking?</p>



<a name="195071959"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195071959" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> eddyb <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195071959">(Apr 23 2020 at 14:48)</a>:</h4>
<p><span class="user-mention" data-user-id="116083">@pnkfelix</span> so the problem is how e.g. tuples are pretty-printed by the debugger</p>



<a name="195071964"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195071964" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195071964">(Apr 23 2020 at 14:49)</a>:</h4>
<p>in terms of how it would help to build field access expressions? Woludjthat normalize the output?</p>



<a name="195071972"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195071972" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> eddyb <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195071972">(Apr 23 2020 at 14:49)</a>:</h4>
<p>you can just print each field instead of the whole tuple</p>



<a name="195071990"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195071990" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> eddyb <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195071990">(Apr 23 2020 at 14:49)</a>:</h4>
<p>(in the debugger)</p>



<a name="195072001"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195072001" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195072001">(Apr 23 2020 at 14:49)</a>:</h4>
<p>yes okay, you are indeed suggesting normalization of the output</p>



<a name="195072022"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195072022" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195072022">(Apr 23 2020 at 14:49)</a>:</h4>
<p>I'd be cool with that, personally</p>



<a name="195072072"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195072072" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195072072">(Apr 23 2020 at 14:49)</a>:</h4>
<p>and then the testing of the pretty-printing of more complicated types would be restricted to just one version of GDB ?</p>



<a name="195072091"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195072091" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195072091">(Apr 23 2020 at 14:49)</a>:</h4>
<p>this sounds like a MCP, to be honest</p>



<a name="195072258"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195072258" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> eddyb <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195072258">(Apr 23 2020 at 14:50)</a>:</h4>
<p>what @nagisa is proposing makes a lot more sense, OTOH</p>



<a name="195072267"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195072267" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195072267">(Apr 23 2020 at 14:50)</a>:</h4>
<p><span class="user-mention silent" data-user-id="123586">nagisa</span> <a href="#narrow/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818/near/195071910" title="#narrow/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818/near/195071910">said</a>:</p>
<blockquote>
<p>Maybe the concept of having debugger tests (as opposed to debug info tests) is flawed in the first placE?</p>
</blockquote>
<p>So you think the answer may instead me to use some tool (perhaps homegrown) to inspect the DWARF we generate?</p>



<a name="195072300"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195072300" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> eddyb <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195072300">(Apr 23 2020 at 14:51)</a>:</h4>
<p>LLVM has a tool, for example</p>



<a name="195072345"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195072345" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195072345">(Apr 23 2020 at 14:51)</a>:</h4>
<p>I'm okay with that idea too. I think it would also be a MCP, but a worthwhile one</p>



<a name="195072367"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195072367" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> eddyb <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195072367">(Apr 23 2020 at 14:51)</a>:</h4>
<p>having looked at the DWARF standard in the past few months, I'm much more in favor of that approach</p>



<a name="195072371"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195072371" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195072371">(Apr 23 2020 at 14:51)</a>:</h4>
<p>Okay, this was productive, but lets move on to the last nominated issue</p>



<a name="195072394"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195072394" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> eddyb <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195072394">(Apr 23 2020 at 14:51)</a>:</h4>
<p>we'd want to normalize addresses somehow but that's about it</p>



<a name="195072422"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195072422" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195072422">(Apr 23 2020 at 14:51)</a>:</h4>
<p>nom 3/3 "Rename mir::Rvalue to Op." <a href="https://github.com/rust-lang/rust/pull/70928" title="https://github.com/rust-lang/rust/pull/70928">#70928</a></p>
<p>- We discussed this one last week. It would be good to mention that the discussion keeps going and Zulip may be a good place for it.</p>



<a name="195072506"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195072506" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> eddyb <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195072506">(Apr 23 2020 at 14:52)</a>:</h4>
<p>I haven't seen most of the recent discussion</p>



<a name="195072533"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195072533" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195072533">(Apr 23 2020 at 14:52)</a>:</h4>
<p>So yeah, I kind of want to close this PR, but the discussion <em>is</em> moving forward</p>



<a name="195072575"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195072575" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195072575">(Apr 23 2020 at 14:52)</a>:</h4>
<p>I just don't think github is a great place for this kind of discussion ...</p>



<a name="195072591"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195072591" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195072591">(Apr 23 2020 at 14:52)</a>:</h4>
<p>(I'm happy to be overruled)</p>



<a name="195072602"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195072602" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> eddyb <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195072602">(Apr 23 2020 at 14:52)</a>:</h4>
<p>GitHub Discussions, OTOH</p>



<a name="195072649"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195072649" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195072649">(Apr 23 2020 at 14:53)</a>:</h4>
<p>My personal suggestion was to open a Zulip topic right now, post a link to the Zulip discussion, and then close the PR</p>



<a name="195072664"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195072664" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195072664">(Apr 23 2020 at 14:53)</a>:</h4>
<p>but if people would prefer e.g. internals.rlo</p>



<a name="195072681"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195072681" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195072681">(Apr 23 2020 at 14:53)</a>:</h4>
<p>I'm open to that</p>



<a name="195072730"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195072730" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> eddyb <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195072730">(Apr 23 2020 at 14:53)</a>:</h4>
<p>anyway closing the PR is fine especially since we'd want to do the rename from scratch anyway when we pick an alternative</p>



<a name="195072829"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195072829" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195072829">(Apr 23 2020 at 14:54)</a>:</h4>
<p>Right; the main thing is, as you (<span class="user-mention" data-user-id="119009">@eddyb</span> ) pointed out long ago, is that we would need to decide <em>where</em> to hold the bikeshed</p>



<a name="195072861"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195072861" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195072861">(Apr 23 2020 at 14:54)</a>:</h4>
<p>yet another option would be to post this as an MCP</p>



<a name="195072875"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195072875" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195072875">(Apr 23 2020 at 14:54)</a>:</h4>
<p>but I suspect that is overkill?</p>



<a name="195072881"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195072881" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Esteban Küber <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195072881">(Apr 23 2020 at 14:54)</a>:</h4>
<p>Meta-bikeshed discussion</p>



<a name="195072900"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195072900" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195072900">(Apr 23 2020 at 14:54)</a>:</h4>
<p>I'll just open a Zulip</p>



<a name="195072956"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195072956" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> eddyb <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195072956">(Apr 23 2020 at 14:55)</a>:</h4>
<p>maybe ping everyone who had an opinion on-thread?</p>



<a name="195073027"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195073027" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195073027">(Apr 23 2020 at 14:55)</a>:</h4>
<p>fresh thread: <a href="#narrow/stream/131828-t-compiler/topic/To.20what.20to.20rename.20mir.3A.3ARvalue.20.2370928/near/195072985" title="#narrow/stream/131828-t-compiler/topic/To.20what.20to.20rename.20mir.3A.3ARvalue.20.2370928/near/195072985">https://rust-lang.zulipchat.com/#narrow/stream/131828-t-compiler/topic/To.20what.20to.20rename.20mir.3A.3ARvalue.20.2370928/near/195072985</a></p>



<a name="195073046"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195073046" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> eddyb <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195073046">(Apr 23 2020 at 14:55)</a>:</h4>
<p>(I'm mostly saying that because w/o a ping I'll likely never see that thread again :P)</p>



<a name="195073073"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195073073" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195073073">(Apr 23 2020 at 14:55)</a>:</h4>
<p><span class="user-mention silent" data-user-id="119009">eddyb</span> <a href="#narrow/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818/near/195072956" title="#narrow/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818/near/195072956">said</a>:</p>
<blockquote>
<p>maybe ping everyone who had an opinion on-thread?</p>
</blockquote>
<p>will do after I close the PR</p>



<a name="195073105"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195073105" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195073105">(Apr 23 2020 at 14:56)</a>:</h4>
<p>okay so that's all the nom's</p>



<a name="195073171"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195073171" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195073171">(Apr 23 2020 at 14:56)</a>:</h4>
<p>we had two WG checkins scheduled</p>



<a name="195073191"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195073191" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195073191">(Apr 23 2020 at 14:56)</a>:</h4>
<p>WG-parallel-rustc says there are no updates</p>



<a name="195073224"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195073224" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195073224">(Apr 23 2020 at 14:56)</a>:</h4>
<p>and WG-polonius shared an update <a href="#narrow/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818/near/194978584" title="#narrow/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818/near/194978584">up above</a></p>



<a name="195073516"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195073516" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195073516">(Apr 23 2020 at 14:58)</a>:</h4>
<p>So that's all, folks! Thank you so much to everyone in <span class="user-group-mention" data-user-group-id="897">@T-compiler/meeting</span> for attending! you are awesome. Stay healthy, stay safe!</p>



<a name="195113837"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195113837" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> bjorn3 <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195113837">(Apr 23 2020 at 20:15)</a>:</h4>
<p><span class="user-mention silent" data-user-id="123586">nagisa</span> <a href="#narrow/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818/near/195071910" title="#narrow/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818/near/195071910">said</a>:</p>
<blockquote>
<p>Maybe the concept of having debugger tests (as opposed to debug info tests) is flawed in the first placE?</p>
</blockquote>
<p>I disagree. I just had an instance today where the debuginfo generated by cg_clif looked plausible, but it violated the DWARF spec in such a way that gdb ignored it. (missing some mandatory attributes) Using a debugger test detects this, while using a debug info test, it is hard for reviewers to know that there is a problem. Debug info tests can be used to complement debugger tests though.</p>
<p><a href="https://github.com/bjorn3/rustc_codegen_cranelift/pull/978" title="https://github.com/bjorn3/rustc_codegen_cranelift/pull/978">https://github.com/bjorn3/rustc_codegen_cranelift/pull/978</a></p>



<a name="195184933"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195184933" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> RalfJ <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195184933">(Apr 24 2020 at 13:08)</a>:</h4>
<p><span class="user-mention silent" data-user-id="116083">pnkfelix</span> <a href="#narrow/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818/near/195065950" title="#narrow/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818/near/195065950">said</a>:</p>
<blockquote>
<p>is <span class="user-mention silent" data-user-id="120791">RalfJ</span> here? I'm curious why we don't just go ahead and revert on master too?</p>
</blockquote>
<p>hm, good question. I thought we'd get a fix on master quickly.</p>
<p><span class="user-mention" data-user-id="116083">@pnkfelix</span> looks like you are taking care of that?</p>



<a name="195187791"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195187791" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195187791">(Apr 24 2020 at 13:31)</a>:</h4>
<p><span class="user-mention" data-user-id="120791">@RalfJ</span> yeah that's my plan. I didn't follow through yesterday (childcare stuff got in way), but hope to do so today.</p>



<a name="195190785"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/weekly%20meeting%202020-04-23%20%2354818/near/195190785" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> RalfJ <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/weekly.20meeting.202020-04-23.20.2354818.html#195190785">(Apr 24 2020 at 13:55)</a>:</h4>
<p>great, thanks!</p>



<hr><p>Last updated: Aug 07 2021 at 22:04 UTC</p>
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